Rivière· 21 segments

Mera

Crosses 4 administrative regions : Como, Lecco, Maloja, Sondrio

rivière

Total length

90km

Max discharge

121,9m³/s

Max Strahler

Segments matched

River geography4 admin regions · 0 communes

Parent watershed

hybas-2080527060750 km²

4 administrative regions crossed (GADM L2)

Sondrio
Lombardia · Italy
30.1 km
in this dpt
Como
Lombardia · Italy
13.9 km
in this dpt
Lecco
Lombardia · Italy
1.3 km
in this dpt
Maloja
Graubünden · Switzerland
0.0 km
in this dpt

14 intersecting protected areas

Piano di Chiavenna
IUCN Not Reported
Special Areas of Conservation (Habitats Directive)
Pian di Spagna - Lago di Mezzola
IUCN IV
Wetland of International Importance (Ramsar Site)
Pian di Spagna e Lago di Mezzola
IUCN Not Reported
Special Areas of Conservation (Habitats Directive)
Lago di Mezzola e Pian di Spagna
IUCN Not Reported
Special Protection Area (Birds Directive)
Riserva naturale Pian di Spagna - Lago di Mezzola
IUCN IV
Regional/Provincial Nature Reserve
Plazza
IUCN Not Assigned
Forest Reserves
Riserva naturale Marmitte dei Giganti
IUCN V
Regional/Provincial Nature Reserve
Brentan
IUCN IV
Federal Inventory of Dry Grasslands and Pastures of National Importance
Monumento naturale delle Cascate dell'Acqua Fraggia
IUCN III
Other Protected Natural Regional Areas

5 more protected areassorted by area

Dascciun
IUCN IV
Federal Inventory of Dry Grasslands and Pastures of National Importance
Dair
IUCN IV
Federal Inventory of Dry Grasslands and Pastures of National Importance
Motta
IUCN IV
Federal Inventory of Dry Grasslands and Pastures of National Importance
Casnac
IUCN IV
Federal Inventory of Dry Grasslands and Pastures of National Importance
Brentan
IUCN Not Assigned
Private Nature Reserves

1 page = 1 named river (aggregation of 21 HydroRIVERS v10 segments). Spatial join cached after first hit.

Species present

271 distinct species · 1 199 observations

Source: GBIF Occurrence snapshot 2026-05-01.

Ecological tissue

Sample of 40 species (selected proportionally per kingdom among those with at least one documented interaction here) to keep the graph readable. Hover for details, click to explore the full ecosystem of a species.

ℹ️ The territory contains many more species than displayed and all their documented interactions: the graph is intentionally the structural skeleton (top-N species by composite local score, edges filtered by Serrano 2009 disparity filter α=0.2).

RègnesAnimalPlanteChampignonBacterie

RelationsPredationParasitismeSymbiosePollinisation

StatutEn dangerVulnérableProtégéeEndémique

RègnesAnimalPlanteChampignonBacterie

RelationsPredationParasitismeSymbiosePollinisation

StatutEn dangerVulnérableProtégéeEndémique

Indicateurs du tissu écologique

Tissu écologique de Mera : 29 espèces reliées par 120 interactions GloBI sur 6 types (connectance 13.9%, filtre Serrano α=0.2). 13 bulles taxonomiques (cascade genre/famille GloBI, ≥3 espèces).

Espèces affichées

Interactions affichées

120

Connectance

0.139

Patrimoniales

Plus dense que (national)0 %(top 100%)

Comparaison sur la connectance du réseau local complet vs distribution nationale (toutes les communes françaises).

Hydrology (HydroRIVERS v10)